This is a regression caused by
commit 8c43f963
that was part of the MDEV-12112 fixes.

page_is_corrupted(): Never interpret page_no=0 as encrypted.

This is a regression after MDEV-13671.

The bug is related to key part prefix lengths wich are stored in SYS_FIELDS.
Storage format is not obvious and was handled incorrectly which led to data
dictionary corruption.

SYS_FIELDS.POS actually contains prefix length too in case if any key part
has prefix length.

innobase_rename_column_try(): fixed prefixes handling

Tests for prefixed indexes added too.

Closes #1063

would not hide more interesting information, like invalid memory accesses.


some "leaks" are expected
- partly this is due to weird options parsing, that runs twice, and
does not free memory after the first run.
- also we do not mind to exit()  whenever it makes sense, without full
cleanup.

MDEV-17470 Orphan temporary files after interrupted ALTER cause InnoDB: Operating system error number 17 and eventual fatal error 71

Orphan #sql* tables may remain after ALTER TABLE
was interrupted by timeout or KILL or client disconnect.

This is a regression caused by MDEV-16515.

Similar to temporary tables (MDEV-16647), we had better ignore the
KILL when dropping the original table in the final part of ALTER TABLE.

Closes #1020

This fixes a regression that was introduced in MySQL 5.6.6
in an error handling code path, in the following change:

commit 024f363d6b5f09b20d1bba411af55be95c7398d3
Author: kevin.lewis@oracle.com <>
Date:   Fri Jun 15 09:01:42 2012 -0500

    Bug #14169459 INNODB; DROP TABLE DOES NOT DELETE THE IBD FILE
    FOR A TEMPORARY TABLE.

Docs grammar fixed

update engines/ suites

followup for c4ab352b

it's listed in MYSQL_ADD_PLUGIN() declaration,
so it must always exist, jemalloc or not.

btr_node_ptr_max_size(): Do not reserve extra space for indexed VARCHAR(0)
columns.

os_event::is_set(): protect os_event::m_set with os_event::mutex

When using a wrong key, all encrypted pages will look corrupted,
and occasionally the test may access other pages than
the clustered index root page.

Also fixes:
MDEV-17741 Assertion `thd->Item_change_list::is_empty()' failed in mysql_parse after unsuccessful PS

The problem was introduced by:
  commit f033fbd9
  Changed the test case for MDEV-15571

It was later fixed, but in 10.3 only:

  commit ce2cf855
  MDEV-16043 Assertion thd->Item_change_list::is_empty() failed in mysql_parse
  upon SELECT from a view reading from a versioned table

This patch is a backport of ce2cf855 to 10.2

- Refactor code to isolate page validation in page_is_corrupted() function.

- Introduce --extended-validation parameter(default OFF) for mariabackup
--backup to enable decryption of encrypted uncompressed pages during
backup.

- mariabackup would still always check checksum on encrypted data,
it is needed to detect  partially written pages.

In MDEV-13103, I made a mistake in the error handling of
page_compressed=1 decryption when the default
innodb_compression_algorithm=zlib is used.
Due to this mistake, with certain versions of zlib,
MariaDB would fail to detect a corrupted page.

The problem was uncovered by the following tests:
mariabackup.unencrypted_page_compressed
mariabackup.encrypted_page_compressed

MDEV-17975 Assertion `! is_set()' or `!is_set() || (m_status == DA_OK_BULK && is_bulk_op())' failed upon REVOKE under LOCK TABLE

open_grant_tables() returns -1/0/1, where -1 is an error, while 1 is not.
Don't store it's return value in bool

it'll be either system zlib.so or bundled with the server (but still
external to C/C) zlib.a

Part two, temporary tables.

Make temporary tables respect TABLE::m_needs_reopen.

See also 77cd7542

Simplify the check, remove redundant code.

Add a safety check to avoid linking with static jemalloc_pic.a
if jemalloc version is 5+.

This doesn't fix the issue on Gentoo, it should be fixed in the ebuild.